Setts



(No Model.) L

W. -L. & W. G. DODGE. CYLINDER COCK.

Y No. 445,979. Patented Feb. 10, 1891.

9 Hummm/nur o limiten 'Farmer reina.

lVILLIAM Il. DODGE AND IVILLIAM C. DODGE, OF IIAVERIIILL, MASSACHU- SETTS; SAID IVILLIAM Il. DODGE ASSIGNOR TO ORIN E. MIOKEL, OF

SAME PLACE.

CYLlNDERwCOCK.

SPECIFICATION forming part of Letters Patent No. 445,979, dated February 10, 1891.

Applicationiiled June 2, 1890. Serial No. 353.942. (No model.)

To all whom, t may concern:

Be it known that we, WILLIAM L. DODGE and l/VILLIAM O. DODGE, of Haverhill, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Cylinder-Cocks, of which the following is a specification.

This invention relates to cocks which are used to permit the escape of water of condensation from steam cylinders generally, and particularly to that class of cylindercocks which are operated automatically by the movement of the piston in the cylinder in contradistinction to the more common type, in which each cock is opened and closed by a movement ot' the engineer' or Iireman through devices connecting the cylindercocks with the cab of a locomotive.

rlhe invention has for its object to provide a simple and eit'ective automatic cylindercoclc; and it consists in the improved construction which we will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this speciiication, Figure l represents a longitudinal section ot' ithe cylinder and Steam-chest of a locomotive-engine and a cylinder-cock embodying myimprovements connected with the cylinder. Fig. 2 represents an enlarged section on line 2 9 of Fig. l. Fig. 3 represents a section on line 3 3 of Fig. 2.

The same letters and iignres of reference indicate the same parts in all the iigures.

In the drawings, a represents the cylinder of a steam-engine, and l) represents the piston thereof.

c represents the steam-chest, d the valve therein, and e e the ports connecting the opposite endsof the cylinder with the steamchest, all of the parts above named being of the usual form and arranged in the usual way.

j" represents the casing of my improved cylinder-cock, the same being provided with two chambers or enlargements e e, and a central chamber 5 between the chambers e 1l.

G 6 represents pipes connecting the chambers e t with the opposite ends ot the cylinder o, so that water of condensation from either end of the cylinder may pass through one of the pipes 6 to the casingf. The chambers l et are connected with the central chamber 5 by means of cylindrical ports or passages 7 7, through which any water of condensation entering either chamber le may pass to the central chamber 5, from which 1t escapes through an outlet-pipe 8, extending through the side of the casing f and connecting with the chamber 5.

9 9 represent circular or disk-shaped valves formed to closely lit the passages 7 7, so that when either valve is in the corresponding passage the chamber 5 will be shut ott from the chamber 4. at the opposite side ot' said valve. The valves are connected by a stem l0, said Yvalves and stem being preferably made in a single piece. The stem 19 is of such length that when one valve is in the corresponding passage 7, inclosing the latter, the other valve will project outside of the other passage 7 and occupy a position in the chamber et, which is connected by the lastnamed passage 7 with the central chamber 5, so that when communication between the central chamber 5 and either of the chambers 4 is shut off by one of the valves the other chamber/twill be in communication with the central chamber The stem l0 is provided with an enlargement between the valves 9 9, and in said enlargement is formed a slot ll, through which passes a stud l2, which is affixed to the casngand passes through the center ofthe chamber 5. rlhe slot ll is ot' such length that it limits the sliding movement of the valves 9 9 in each direction, so that each valve can move inwardly or toward the central chamber no farther than is required to close the passage 7, with which such valve co-operates.

In each chamber e are a series of longitudinal guides 13, formed as radial ribs on the interior of the casing, their inner edges being arranged to support the valve 9, that projects into the chamber et, so that valve 9 is supported on all sides when it projects into the chamber 4 as well as when it occupies a position within the passage 7.

The operation is as follows: Suppose steam to be moving in the direction indicated by the arrow in Fig. l. A portion of the steam entering the cylinder enters the left-hand end of the casing f through the pipe G, connecting that end with the cylinder, and forces the valves 9 9 to the position shown in Figs. I and 2, one of the valves being thus moved to position to shut off the left-hand end of the cylinder from the central chamber 5 and outletpassage 8, while the other valve 9 is moved outwardly into the other chamber 4, so that a space exists around it through said chamber 4 and between the guides 13 therein for the passage of the water-of condensation from the right-hand end of the cylinder to the centrall chamber 5 and outlet S. Vhen the movement of piston b is reversed,the contents are reversed in the cylinder-cock, the valve 9, which is shown in the drawings as projecting into the chamber 4, connected with the righthand end oi' the cylinder, being moved inwardly into the corresponding passage 7,

While the other valve 9 is moved outwardly and opens communication between the lefthand end of the cylinder and the central chamber 5. It will be seen, therefore, that the cylinder-cock is always open at the eX- hausting end of the cylinder, so that there is always a free escape of the water of condensation without loss of steam from the opposite end of the cylinder.

We are aware that it is not new to construct a cylinder-cock which is operated by the steam-pressure in the cylinder, so that the exhaust end of the cylinder is automatically connected with an escape or outlet for the waterof condensation. Hence we do not claim, broadly, the automatic operation of a cylinder-cock.

XVe claiml. In a cylinder-cock, the combination of the casing f, having the receiving-chambers 4 i, the central outlet-chamber connected with the chambers I 4 by ports or passages 7 7, the guides I3 in the chambers '4: constituting con tinuations of the passages 7, the valves 9 O and their connecting-stem 10, and means for limiting the endwise movement of said valves, as set forth.

2. In a cylinder-cock, the combination of the casing f, having the receiving-chambers et 4, the central outlet-chamber 5, connected with the chambers 4L 4 by ports or passages 7 7, the guides 13 in the chambers 4, constituting con tinuations of the passages 7, the valves 9 9 and their connecting-stem IO, said stem having a slot ll and a fixed stud or pin passingi through said slot, the pin and slot being arranged to limit the longitudinalmovements of the valves, as set forth.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, this 28th day of 6o May, A. D. 1890.

WILLIAM L. DODGE.

WILLIAM C. DODGE.

Vitnesses: MINNIE E. MARCY, FREDERICK O. RAYMOND. 

